Worth noting OP. You've included potentially sensitive information, since the user has their email hidden from the public, but your screenshot shows it despite it being somewhat low quality. Might be worth removing it, we don't actually need to see what it looks like on their side.
I thought newly created accounts can post immediately after registering and wouldn't have to wait 6 minutes before they can post and the 6 minutes timer only starts after the newly created account posted anything.
The account registered on Jan 16th. In all likelihood, the user is logging in perhaps even multiple days in a row, and then trying to post immediately after logging in, because I do believe that logging in counts as an action which triggers the waiting time between posts etc.
So, its not linked to the registration or being a new user per say, its the logging in, and then trying to post before the waiting time has expired.
I think there is a pretty strong argument to say that logging in (nor reporting posts) should count towards the 360 second (or however many seconds the account is subject to having to wait) limit. It may make sense for some accounts to have a higher wait time for reporting posts.
I can’t think of any reason why someone should have to wait 6 minutes to post after logging in. I don’t think it is unreasonable to believe that someone may read many posts while not logged in, find something interesting, log in, and try to post.